3b^2+18b+17=-3

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Solution for 3b^2+18b+17=-3 equation:


Simplifying
3b2 + 18b + 17 = -3

Reorder the terms:
17 + 18b + 3b2 = -3

Solving
17 + 18b + 3b2 = -3

Solving for variable 'b'.

Reorder the terms:
17 + 3 + 18b + 3b2 = -3 + 3

Combine like terms: 17 + 3 = 20
20 + 18b + 3b2 = -3 + 3

Combine like terms: -3 + 3 = 0
20 + 18b + 3b2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
6.666666667 + 6b + b2 = 0

Move the constant term to the right:

Add '-6.666666667' to each side of the equation.
6.666666667 + 6b + -6.666666667 + b2 = 0 + -6.666666667

Reorder the terms:
6.666666667 + -6.666666667 + 6b + b2 = 0 + -6.666666667

Combine like terms: 6.666666667 + -6.666666667 = 0.000000000
0.000000000 + 6b + b2 = 0 + -6.666666667
6b + b2 = 0 + -6.666666667

Combine like terms: 0 + -6.666666667 = -6.666666667
6b + b2 = -6.666666667

The b term is 6b.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6b + 9 + b2 = -6.666666667 + 9

Reorder the terms:
9 + 6b + b2 = -6.666666667 + 9

Combine like terms: -6.666666667 + 9 = 2.333333333
9 + 6b + b2 = 2.333333333

Factor a perfect square on the left side:
(b + 3)(b + 3) = 2.333333333

Calculate the square root of the right side: 1.527525232

Break this problem into two subproblems by setting 
(b + 3) equal to 1.527525232 and -1.527525232.

Subproblem 1

b + 3 = 1.527525232 Simplifying b + 3 = 1.527525232 Reorder the terms: 3 + b = 1.527525232 Solving 3 + b = 1.527525232 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + b = 1.527525232 + -3 Combine like terms: 3 + -3 = 0 0 + b = 1.527525232 + -3 b = 1.527525232 + -3 Combine like terms: 1.527525232 + -3 = -1.472474768 b = -1.472474768 Simplifying b = -1.472474768

Subproblem 2

b + 3 = -1.527525232 Simplifying b + 3 = -1.527525232 Reorder the terms: 3 + b = -1.527525232 Solving 3 + b = -1.527525232 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + b = -1.527525232 + -3 Combine like terms: 3 + -3 = 0 0 + b = -1.527525232 + -3 b = -1.527525232 + -3 Combine like terms: -1.527525232 + -3 = -4.527525232 b = -4.527525232 Simplifying b = -4.527525232

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-1.472474768, -4.527525232}

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